Service manual

FIRST TO DIVE 5
6. Using the tool (129198), unscrew the diaphragm nut
(127814 or 127832). Remove the washer (127815) and
the diaphragm (127816).
7. Using the 11/16” spanner, unscrew the nut (127818).
8. Push slightly the valve spindle (127817). Unscrew the
valve spindle screw (127819) from the valve spindle.
9. Turn over the 2
nd
stage and recover the shuttle-valve
assembly (AP2036), spring (AP2021) and counter-
balance chamber (127607). Remove the O-ring
(AP2041) and the valve seat (AP2034).
10. Take out the valve spindle (127817) manually, Recover
the O-ring (473056)
11. Using a 3mm Allen key, unscrew the plug (127824 or
127833 or 127846). Remove the adjusting knob
(127821).
12. Unscrew the cam (127822) from the valve spindle screw
(127819). Using a 3mm Allen key, unscrew the adjusting
screw (127823) from the cam (127822). Remove the O-
rings (121130, 213716 and 124707).
13. Using a screwdriver (111399) unscrew the seat
(AP2033). Push the tool (116236) inside the insert and
push the seat out. Remove the O-ring (444243).
14. Left up the edge of the exhaust valve and check that the
surface is clean and free from any scratches. It should
be flexible and have a clean contour. If it is in good
condition it is not necessary to remove it and it can be
reused. If it shows any signs of deterioration it should be
removed.
END OF DISASSEMBLY